Apparatus for coating metal.



W. GIBSON, s3 APPARATUS FOR UOATING METAL APPLICATION IILBD MAY 20, 1911.

Patented Sept. 3, 1912.

' 2 SHEETS-SHEET 1.

. W. GIBSON, s1, APPARATUS FOR GOA'IING METAL.

APPLICATION FILED MAY 20, 1911.

1,037,235, Patented Sept. 3,1912.

2 SHEETS-SHEET 5].

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To all whom ma 6mm;-

Be it known that I, W LLIAnr GmsoN, Sr.,

of Vander ift,-i n'the county of \Vestmore-n land and. tatef'of Pennsylvania, have invented a new and 'useful -Ap a'ratus for Coating Metal, of which the fa lowing is. a

full, clear, andeicactdescription, reference being had to th'e'a'c'coinpanying drawings, forming part ofthis specification. 10 My invention-relates to ap aratus for .coatlng metal, and more particu arly relates to galvanizing apparatus, used 1n coating.

metal sheets orplates with molten sp'elter or like coating metal.

Heretoior'e, incoating such: naterial'smg sheets orI plates or other articles beingcoated are caused topass through, the bath of molten coating. material,' entering and passing through ,the'molten' metal at one end and emerging from the opposite end,

of the galvanizing'ftank or melting pot. In the passage ofthejsheets or plates, through the ath of molten coating metal, any 'im' purities carried into the metal by theunder surface of su ch plates are retarded and pre- Tented from rising to the surface of the bath by the plates or sheets when dislodged therefrom inpassing through they pot and in consequence a considera le'-'quantity of so the lates or sheets coated emerge from'the pot avin'g dirtradherl'ng to the lower side 'of the plates and causing a dirty or streaked lower surface on such plates or sheets. i v One object hf mvin'vention is'to provide apparatus for coating sheets and plates by the use of which any dirton the under side of such plates'is dislodged and removed to the top of the bath of coatin metal and-by 40 which the numberof plates aving an imperfect or streaked bottom surface-is greatly lessened and reduced.

Another objectof this invent-ion is to provide a galvanizing or coatin apparatus having improved meanswhere y the bath ofmoltenc'oating material is stirred or agitated and currents are. created therein beneath' the surface of the bathand means adapted to direct a current of the-molten material against the bottom. or under surface otthe plates during thepassage' of the plates through the bath'oim'olten' coating material int-he melting pot to cause finely divided solids or other. impurities on the surface of the incoming plates to become,

bath." v y za-flll'tl'll' object of the invention is to provide agalvani'zing or melting .pot havng novel" means for agitating or stirring the molten metal and for guiding or direct: ing the currents set up in the inolten material, and having improved-means for actuating the agitating mechanism:-

Referring to the drawings, Figured is a;

of a galvanizing or melting pot having plate feedi mechanism and a tating inech anism Patented's paa1912'.

dislodged andrise to U10 surface of the a'ppli thereto, adapted or use inwcarrying out my invention, the guiding and feeding mechanism and the bath agitating mechanism' being in end elevation in Fig. 2. 'Fig.: '3 is a sectionalfs'ide elevation of the pot showing the plate or sheet feeding and the a bath agitating mechanism removably secured'in positionin the pot; Fig. 4. is a sectional *endelevation' of the melting pot," the feedin and guiding mechanism-used in passing p ates into and hut of the bath of moltenimetal in the pot, and ofthe agitating mechanism formingpart of this invention.

f In the ,accomfianyipgldrawings, 2 designate'sa galvanizing or melting pot built ,up'l of rolled steel plates and angles in the -usual manner, The pot 2 isequipped with any suitable heating apparatus by means of which the coating materials uplaced in the pot are melted and maintained in a molten condition when the apparatus usei The apparatus employed. in heatinggithe pot being old and well" known and not formingpart of this invention is not further described.

gtemovuoly located inthe galvanlhlhg pot isg't he plate feeding and guidingmechanism which is constructed anu arranged to receive'the plates at one end of the pot and deliver the plates into and below the level of the bath of'mol ten metal maintained in the pot-{and out of the pot at the opposite endthereof. 1

As shown, the'feeddnmechanism-at one side of the pot comprlsesthe feed-rollers- 3 and 4. secured on shafts 5 and 6, the shafts being mounted in'bea'rings l and 8 on the supports 9, 9, removably secured upon the marginal top flanges .10 of the galvanizing not 2.

. iplan and; Fig. 2 asectional end elevation;

- At the opposite side of the pot 2 are the feed-out rollers 1]. and 12 which are secured on shafts 13, 14, carried in the bearings 15, 16, ,these hearings also being mounted on 5 the supports or carriers 9, 9. Spur gears v 15 adapted to be moved into engagement with the plates between this roller and the feedout roller 12. In the construction shown, one end of the levers 17, which are pivotally secured" on the supports 9, 9, engages with '20 the bearings 15 for the roller 11 and a counterweight18 is provided on the other end of the levers 17 so as to yieldingly hold the faces of the rollers 11 and 12 in contact with the plates, and, when the rollers are ca ised to rotate, to deliver or feed plates g1 (led into the bite of these rollers out of'th'e gallvanizing or coating pot.

Secured to the supports 9, 9, for the feedin and feed-out mechanism', are the cur-v23 7 3Q, guides 19 and 20 for the sheets or plat I these guides extending downwardly into the galvanizingpot. The curved top guides 19 v and bottom guides 20 extend as shown, across the width of the pot 2, and'are located at 5 separated intervals in the length of themelt ing pot, so asto permit the molten coating metal to freely come in contact with the under surfaces of plates or sheets p ssed between these guides. The guides 1 and '20 engage with opposite sides of the sheetsor' plates delivered into the pot by the feed-in rollers '3 and 4 so as to direct the forward end of these plates downwardly and in: wardly through the molten materials in the pot and then upwardly and-outwardly into the bite of the feed-but rollers 11, 12. A guard 21 is secured on the sup orts9, 9, to deflect the forward end of t e sheets or or sheets to be disc arged by -the feed out rollersll and 12 upon a suitable conveying mechanism by which they are carried away from the galvanizing pot. Phe guard 22 and sheetor plate support 22 also are provided, on the entranceside of the pot, to

. guide the forward end of the plates into the te of the feed-in rollers 3 and 4. U 7 A. rectangular box 23 suspended by the so angle brackets or knees 23 in the galvanizing pot 2 is provided to maintain a supplyof sa' -ammoniac or 'otherfiuxing materialjon the surface of the molten metal in the pot 2. The box has an open t'op'and bottom, the

- 5 lower marginal edge of the box extending to orpreferably a slight .distance below the level at which the-molten spelter or-other coating metal is maintained within the ppt 2. The box 23 is located within the 04:2 in

such position that. the sheets or p ates as they are delivered into the pot 2 by the feedin rollers 3 and 4 first pass through the box,

and the flux maintained therein before entering the molten metal in the pot. I

Opposite guides or guards 24 and 25 are provided below. the feed-in rollers 3 and 4 todirect the forward end of the ,plates between the guides .19 and 20 by which the plates are caused to pass into and through the 'bathof molten material v Secured in bearings 26, 26, so as to be located in the bottom portion of the tank or ot. 2 when the ap aratus is assembledis a paddles or arms 28 mounted thereon. "The paddles 28 may. extend :continuousl the shaft 27, or they may be arrange at separated intervals in th'e'length of the shaft 27.

along orizontal rotary s aft 27 having a series of The end of the shaft 27 carrying the paddles 1 gears 33, 33, to a horizontal shaft 34 mount- I ed in the bearings 35, 35, on the support 9 and on the outer end of the horizontal shaft is a sprocket wheel 36 which is operatively' connected by a sprocket chain 37 with the sprocket wheel 38 on the shaft 5 for the feed-in roller 3. q p H The shafts. 5 and-6 for the feed-in roller's 3 and 4 are connected together by means of the spur gears 3, 4", and the shafts 13 and 14 for the feed-out rollers 11 and 12 by spur gears 11, 12,- so that these rollers are positively driven in pairs. A sprocket wheel 39 on the shaft 5 and the sprocket wheel 40 i)n the shaft 14 are connected by suitable sprocket chains with a suitable driving motor or other prime mover (which for the sake of cle'arness is not shown.) plates downwardly as they. emerge and pass 50 upwardly from the at and cause the plates The paddles or heaters 28 are surrounded by a bent plate 28 the marginal edges of this plate. defining the side edges of a rectangular upwardly extending opening connecting the space inclosed-by the plate with the spaces between the guides 19 and'20 and directing the currents set up in the molten lag between the guides 19 and 20. (See Fig.4.) i H In the operation of my improved appas ratus the supports 9, 9, which carry the 1 materials upwardly against the plates passfeeding and guiding apparatus for the plates or sheets, are placed in position in f the pot, the supports 9, 9, for this apparatus being removably secured on the flanged top edges of the tank or pot 2. Be-

- the plates forwardly andjdownwardlyfthe tained'at about the. level and additions beingmade at necessary-in;

'.' 4 aawaasfz 1" l Q fore placing-the supports 9, carrying the feedingand iding mechanism, inpos'ition, heat appl ed tothe galvanizing tank or pot and a quantity ofspelter orothe'r ooat ln'g material ism'elted therein, the molten coating material *generall being. main- -X in the pot.

' .tervals to maintain this level the pot.-

' sprocket whe'el'38 onone end ofthe's'ha The shaftsfor the rollers 3 andyt 'ar'eggefared' together byimeans of the spur ears3', and 4, so as to'rotate in unison an the-drivin 5 for the roller 3 is connected "bythe foi'ward end of the plates being directed bythe ides Z4, 25, located between the curved gui es 19 and 20, land the rollers 3 and '4. The curved guides 19 and 20 cause the sheets and'plat'es to move downwardlyand then upwardly in; passing throufgh ,the 'molten coating material, and the orward end of the' latesis directed by means of the guides 9,.20, andcaused to enterrbe t'weenithe feed-out pinchrollers lland 12 on the-'dischar e side ot the apparatus.

The rollers 11 nd 12 are positive y driven and by frictional engagement'with the sur-.

faces of the plates 11ft the successive lates, out of the molten coating material. 5 theforward end of the plate emerges from between the rollers 11 and 12, it engages with and is deflected'downwardly by the guide on guard 21 and is caused to move horizohtally onto a suitable conveying mechanism on which the plates are taken away from the coating apparatus.

'hen the feed-in and'feed-out rollers are rotated the paddle shaft-- 2?,is also caused to rotate through the gears 29 and 33, onthe shafts 30 and 34: and the paddles 28 'on the shaft 27, When rotated, agitate or stir and set up currents in the molten material. iii the bottom of the pot. The opening in the top of the shield which sui rounds the paddles 2T directs or guides the, currents set up by the agitating mechanism beneath the surface of the molten contents of the pot or tank and thc so-formed currents by striking against the downwardly and inwardly moving bottom surface of the plates,- dislodging any dirt or other foreign sub fm a'terialland .ytill' to the surface of the molten metal in -"the tank or ,pot'outof the path of the a mummy saured ih at I plates ha agitating .mechanis stances carried into the bath on the under surface of the plates, such fore1gn materlals,

When-dislodged, rising to the top'of the I moItenE-ffinc' r other coating metal in the. pot orxtank." Accumu'lations of such foreign materialsjare removed from time to time, as s foiindflnebessaryi 7 Anyforeign materials on theta surface of the plates will becomev dislodg through the coating ingI-fre'ed from the plates,

thr'ou h the apparatus. The above escribe operatlons are re-' pea-ted tvith the successive-plates "orjsheets as fften'a's reqtiired injthe'operation-fo'f my lm-i'oved'ap'parat-us. it is frequently necessaryf to remove from the bottom 'ofi'tlie' :Ihlhg p'dt the, feeding *and' fedlraiiism is v messaged top marginafed'g'es-o I "t' ior tank, so as t'o'be readily renaming replaced when such cleaning operations become necessary or debirable m making'frepairs. I

J The -a'dmntage's 'of myinven'tion will be .ppparent to those skilled in the art. 13' its use, foreign materials on the bottom auraccept the plates 01' sheets when the plates enter the coating material, are dislodged and remoyed before enterin the coating metal far enoughto be ea'rrie out of the pot'by the plates and sheets. 1 he manufacture of galvanized or.other metal coated sheets and a streaked or dirty under surface is avoi ed and over-com a The apparatus is simple and is easily kept in repam,

Modifications in. the construction and. a rangement of the parts may be made without de arting from my invention.

fe construction of the agitating mechanism; and the mean employed to drive the may be changed and other variations in the construction and arrangement of the parts may be made without departing from my invention.

his

1. In apparatus for coating metal the com- 'bination' with Y a pot for molten .coating metal and means for passing metal to be coated into and out of said pot, of mechanlsm for agitating the molten contents of the pot, and means for actuating said agitating mechanism.

, 2. In apparatus for coating metal the combination with a pot for molten coating metal and means for passing metal to beicoated into and out of said pot, of means for cre- .atin'g' a current in the molten contents of said pot and mechanism for actuating said means.

3. In apparatus for coating metal .the v combination with a pot for molten coating metal and means for passing metal to coated into and out of said pot, of means for creating currents in the molten contents :or plates comprising a'galvamzing pot conof said pot, and means for cont'ro'llingthe direction of flow of the currents created in the contents of the pot.

4.,In apparatus for coating metal the combination 'with a pot for molten coating .metal and means for passing metal to be for stirring the moltenspelter when the gal vanizing apparatus is in operation.

6. Apparatus for galvanizing metal'sheets ,taining molten spelter,'means fordelivering' the sheetsor platesinto said pot, means for A? v I p 1,93 ,135

guiding the plates through the'molten spelter, means for removing the sheets or plates from said pot, and mechanismfin the: pot for creatingalcurrent in the molten spelter during the operation of the galvanizing apparatus. f

7. Apparatus'for galvanizingmetal sheets or plates comprising a galvanizing pot con tainingmolten spelte'r, means-for delivering thesheets or plates into said pot, meansfor guiding the sheets or plates through the molten 'spelter, means for removing the sheets and plates from said pot and mechanism in the pot for creating and directing a current I in the molten spelter against the bottomsurface ofsheets-or plates passing through the 4 galvanizing apparatus.

In testimony-.whereot,' I have hereunto set my hand. y ILL M IBS N; Witnesses:

A. H. BEALn,. R. G. S0o'1'r 

